Hrdina



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July l5, 1952 R. HRDINAv REVKING SHUTTLE FEELER CARRIED WEFT CUTTER 2'SHEETS-SHEET 2 Filed Sept. 2, 1948 Patented July 15, 1952 nai/omeSHUTTLE FEaLEacAnai-n WEET `comme Rudolf rdina; EradecKraloveyczechoslovakiaf ApplicationlSeptemher 2, 1948,v SerialNoi47,5413y f Inv Czechoslovakia December 5,1947;

'I *he'present invention relates-to A.the automatic changing ofj bobbinsin-looms, and .particularly to a shuttle 'feelefrfmechanism-and.weftthre'ad.

cutting device. The presen-t invention constitutes an improvement overthe operation and con struction ofthe weft stop motion device disclosedinmy United Statesv Patent 2,027,776.

Various devices have beenfdeveloped. in the'.

past for determining`v the bobbi-n. changing. position of a shuttle,forcuttingtheweft thread when a break in the thread occurs and forpulling. the brokenweft thread out of the range of the Vwarp threads:The shuttle position determini-ng de-V vice is referred to as,v a feelerandV comprises a rod adapted to enter1 an aperture in theshuttle, the:feelerand aperture being so positioned-relativelyl that the-feelerentersA the apertureonly whenftl'ie shuttle is in the proper-positionfor a bobbin changing operation. In certain of the prior art-devices themechanism forn cutting the thread has been arranged integrally with theshuttle feelermechanism and Athe two normally penetrate' the shuttle boxand the Shuttle wall througha common aperture for-convenience sake andizo-avoid unnecessary weakening of--the shuttle box andshuttlewall.

, In the Prior devcesithe;feelerendbuel" Were normally hinged to thebobbin feeding mechanisinvand partiularly'tozthe bobbin change-hammer soas to from aposition in.whichtfhe feeler was directed1-o-blquely.down-wardiyAv below theshuttle toga position wherein theshuttle feelervwas in substantially horizontal valignment with thefaperturesintheshuttle boi; and shuttle wall.v After the cutting op erationgand thebobbin changing oper-ation had' `heencompleted,v .the debelow theshuttle. f :Separate `mechanism. Vassociated 'with the thread stopmotion was required to eiect the raising and lowering movement. It hasbeen found in practicey that the .raising and .lowering of V the ieelerand-cutting- .mechanism causes -a vibration thereof, thusV .renderingthe .mechanism vincapable cf: proper-.aligriment,` with the apertures. YConstant care andi.checkinglof fthe dev-ice; have beenrequiredtofmaintain. lit

operative 'and v-to-insljire. against va breakdown. of `the-1oom.- Y1tvis, therefore, a; primary object of V-th`.e..pr esent invention toeliminate theswingingv .movement ofthe feeler and: cuttingrnecl'lanisn'i` and .to proiVide a simple-v reciprocatoryrnovement .forthe mecha.raisinsE Such incremente 0'?I1.-b=a`0mVitzlislioi with .less actuating mechanism., than that requiredbyr.previousfderees-and Willefxgqlirse,

end ofthe'pistonfi'zand-isadapte@#tope aid; in-

prev'ention of Vibration of;y the-"Ife'eler andlcu'tter. v

Another object oftheinventionlis to provide a support for the feeler andcutter throughout its movement to guidethe 4vzleificein-'its movementand to assist in th'ejprevention of Vibration; y

Other. objects and features Vof, they invention-will bed'sclosed'in vthefollowing description `where-Y in reference Visfmatl'eto ,theaccompanying -draw ings, in which': Y

Figure/1 is a Yside elevationof the"weft^'stop Referring. particularlynto E igures; 1 anlzgj-a shuttle l having. an 'aperture 2 thereinandcarrying. a .weft hobb'in` 3 is. associated 'withv jajshuttle box-'5which 'is 'provided wthan aperture Q with whichthe. aperture .2"Wil1 align' when theA shuttle is i-n proper vposition iorfa ibobbin,changingfop-g eration.V ,'Th'e shuttle bjo'xi i is' ca rriecli by ,a's'laYQ` not illustrated".y A.An,aic'nitment i Iis provided "on theslayicr a purpose tobe described-hereinafter.

The weft lstopj motion :device consists of alhole low rod '8lwitifxinwhiclfi. is mounted for reciproca- .tiqn ,a piston. r2'. ,Aslot primidierl"in-'V the; y de Walllofzthefrod Sandga 'screw jor apin-is aiixed to, the. .pistonj| 2. through .thefislotto limit themovement-of the pistongilin the rJodfSgj A spririg lll vv.is positionedwithin the jroflf 'andj'clonstantly urgesthe piston i'2` toits..most'extendedposition. Al two arm' leveri, Il is jpivotally securedvto thero 'by means of therpvotipin'il' One1end ,otthearmL Ilislioentlaterally'outwardto forni agen/fa; Y Af paw; le' :positioned-to,engageythe vabutrr''ent, 'a' VAon the sla.' is ibyotallvisecuredtofastricted oscillatory movement. A rock shaft 25 extends through the legsof the feeler and is operatively associated with the movable blade 23and the thread gripping device 24. A lever 26 extending parallel to thepiston I2 is formed integrally with the rock shaft 25 and is adapted tooscillate the rock shaft.

In operation, as the device is moved inwardly through the apertures 2and 6, the pawl I9 engages the abutment 1 and is moved angularly aboutits pivot to a limit defined by the coacting relationship of the face ofthe abutment 1 and the face of the pawl I9, wherein its opposite end isin a position to engage the arm I6 of the two arm lever. On continuedmovement the rod 8 will slide over the piston I2 bringing Athe arm I6into contact with the pawl I9. The lever I6, I1 will be pivoted aboutthe pin I5 until the pawl I9 engages a recess I4 formed in the rod 8.This positively prohibits further movement of piston I2 relative to therod 8. As illustratedin Figure 2, the pin I8 contacts the lever 26 sothat when the arm I 6 is moved rearwardly and upwardly the arm I1 willbe moved to deflectthe lever 26. As the feeler 20 was passed through theapertures 2 and 6, the weft thread 4 was picked up in the slots 2|. Whenthe lever 26 is actuated by the arm I1 and the pin I8, the rock shaft 25is oscillated and the thread grip 24 is moved to hold the thread 4.During the same movement, the moveable blade 23 is moved with respect tothe stationary blade 22 and the thread 4 is cut.

According to the operation of the loom a bobbin change is effected atthis time and the weft stop motion device is retracted pulling the weftthread 4 with it and removing the thread from the range of the warpthreads.

The operation of the weft stop motion device is effected by means of themechanism illustrated 1n Figure 3. When a break in the weft threadoccurs the thread guard and stop motion of the loom effect a partialrotation of a shaft 29 in the direction of the arrow A causing the gearsegment 38 associated therewith to effect a partial rotation of the gear3|. A link 33 ailixed to the pin which is secured to the piston I2through the slot in the wall of the rod 8 is operatively connected tothe gear 3| through a link 32. (Figures 3 to 6). As the gear 3| is givena partial rotation the links 32 and 33 allow the piston I2 to moveforwardly, and at the same time to move the bobbin hammer III by movingrod B and the clamp 28 which pivotally connects the rod 8 and the hammerI8. At this time the slay is moving in the oppositedirection by virtueof the customary loom controls. When the movement of the piston I2 isstopped by virtue of the pawl I9 engaging the abutment 1, the rod 8,relatively speaking, will be slid forwardly along the piston I2 untilthe pawl I9 engages in the recess I4. During the movement of the rod 8,the two arm level I6, I1 is actuated thus effecting the cutting of theweft thread. When the rod 8 is stopped bythe pawl I9 the hammer I0 willpivot about the connection between it and the clamp 28 toA insert a newbobbin into the shuttle. After thisV operation has been completedlthe.slay will be' returned to its normal position and the feeler will remaintemporarily in its extended position and`will withdraw the thread-asrequired in a substantially reverse order. The return of the mechanismiS caused by well-known loom mechanism and controls in conjunctionwith-the already described apparatus. l

Should the shuttle be out of position so `that the aperture 2 thereindoes not align with the aperture 6 in the shuttle box 5, the feeler willabut against the wall of the shuttle and will be telescoped into the rod8 before the pawl I9 engages the abutment 1. Due to the fact that thereis no movement of the pawl I3 it will not engage in the recess I4 on therod 8 and the rod will slide forwardly until the return movement isstarted. Due to the fact that the movement of the rod 8 is not stopped,the hammer I8 will not be actuated to insert a new bobbin in theshuttle.

It is clear, therefore, that the feeler mechanism prevents the actuationof the hammer Il) when the shuttle is not in the proper position for abobbin change.

The feeler mechanism has a linear movement only. This movement isinsured by reason of the support 34 acting on the projection I3 of therod 8. The support serves to unerringly guide the feeler into theaperture 6 and to prevent vibration. As the slay reaches its normalposition the thread guard will be returned to its normal position, thuscausing the rod 8 and other parts of the device to be returned to theirnormal positions.

The shuttle feeler mechanism will remain in its normal yposition untilagain actuated on the Y next breaking of the weft thread.

It is clear that the above described structure is but one embodiment ofmy invention and that various mechanical designs can be utilized toaccomplish the same result. I, therefore, desire to dene my invention,not by the preceding description but, by the following claims.

I claim:

1. In a shuttle feeler mechanism for looms. the combination with a slay,a bobbin hammer. a shuttle box and a shuttle, of a two piece telescopefeeler rod mounted on said hammer for reciprocation in a horizontalplane toward and from said shuttle, means for reciprocating said rod,said shuttle box and said shuttle having apertures therein, the aperturein said shuttle being aligned with the aperture in said shuttle box whensaid shuttle is in position for a bobbin changing operation, said rodbeing aligned with the aperture in said shuttle box for reciprocationinto and out of said apertures, a pawl pivotally secured to said rod, anabutment on said slay positioned to be engaged by said pawl, a threadcutting device mounted on said rod and arranged to enter said apertures,means operatively associating said pawl with said thread cutting device,said pawl being positioned on said rod to engage said abutment only whensaid rod enters both said apertures, said cutting device being actuatedbyl said pawl through said associating means when said pawl engages saidabutment, andfmeans forming a part of said rod adapted to coact withsaid pawl only when said pawl engages said abutment to effect actuationof said hammer. 2. Ina shuttle feeler mechanism for looms, thecombination with a slay, a bobbin hammer, a shuttle box and a shuttle,of a two piece telescopic feeler rod mounted on said hammer forreciproeation in a horizontal plane toward and fromsaid shuttle, meansfor reciprocating said rod,V said shuttle box and said shuttle havingapertures therein, the aperture in said shuttle being aligned with theaperture in said shuttle box when said shuttle is in position for abobbin changing operation. said rod being aligned with the aperture insaid shuttle box for reciprocation intoA and out Aof said apertures, apawl pivotally secured to said rod,- an abutment on said Vslay saidabutment to effect actuation of said hammer, and a stationary supportfor said feeler rod for supporting and guiding said feeler rod duringVreciprocation thereof in a horizontal plane.

3. In a shuttle feeler mechanism for looms, the combination with a slay,a bobbin hammer,

a shuttle box and a shuttle, of a two piece telescopic feeler rodmounted on said hammer for reciprocation in a horizontal plane towardand from said shuttle, means for reciprocating said rod, said shuttlebox and said shuttle having apertures therein, the aperture in saidshuttle being aligned with the aperture in said shuttle box when saidshuttle is in position for a bobbin changing operation, said rod beingaligned with the aperture in said shuttle box for reciprocation into andout of said apertures, a pawl pivotally secured to said rod, an abutmenton said slay positioned to be engaged by said pawl, a rock shaft mountedon said rod transversely thereof, a thread cutting device mounted onsaid rock shaft and arranged to enter said apertures, a lever pivotallysecured to said rod and arranged to coact with said pawl and said rockshaft, said pawl being positioned on said rod to engage said abutmentonly when said rod enters both said apertures, said pawl upon engagementWith said `abutment pivoting to engage and cause pivotal movement ofsaid lever which transmits an oscillatory movement to said rock shaft toactuate said thread cutting device, means forming a part of said rodadapted to coact with said pawl only when said pawl engages saidabutment to eiect actuation of said hammer, and a stationary support forsaid feeler rod for supporting and guiding said feeler rod duringreciprocation thereof in a hori- Zontal plane.

4. In a shuttle feeler mechanism for looms, the combination with a slay,a bobbin hammer, a shuttle box and a shuttle, of a two piece telescopicfeeler rod mounted on said hammer for reciprocation in a horizontalplane toward and from said shuttle, means for reciprocating said rod,said shuttle box and said shuttle having apertures therein,rthe aperturein said shuttle being aligned with the aperture in said shuttle box whensaid shuttle is in position for a bobbin changing operation, said rodbeing aligned with the aperture in said shuttle box for reciprocationinto and out of said apertures, a shaft actuated by said loom upon thebreaking of the weft thread, agear segment secured to said shaft, a geararranged to mesh with said gear segment, a rst link associated with saidgear for rotation thereby, and a second link pivotally connected to saidfirst link at one end and to said rod at the other end to eiectreciprocation of said rod in a horizontal plane upon actuation of saidshaft.

5. A shuttle feeler and weft thread cutting mechanism for looms,comprising, a two piece telescopic feeler rod, a pawl pivotally securedto one piece of said rod, a lever pivotally secured to Y the other pieceof said rod, a feeler afXed to one end of 'said rod, cutting bladesmounted on said feeler, and a rock shaft mounted on said feeler andassociated with one of said blades to oscillate said blade, said shaftextending adjacent said lever and being operatively associatedtherewith, said pawl being actuatable to move said lever to rock saidshaft to oscillate said blade associated with said shaft relatively toanother blade.

6. A safety device for weft stop motion of looms having a slay, a bobbinhammer, a shuttle and a shuttle box, comprising, a two piece telescopicfeeler rod, means arranged to move said feelerV rod into and out ofengagement with said shuttle, means associated With said feeler rod forcontrolling actuation of said hammer, and a support for said feeler rod,said first mentioned means including a linkage associated with thethread stop motion of the loom, said rod being reciprocated in ,l asingle plane and on a horizontal axis substantially parallel to Saidslay by said linkage, said support acting to guide said rodin itsreciproca- 1 tion in said single plane.

RUDOLF HRDINA.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

